We had the exact same problem with the converter in our 2363 this past fall. You can read about it on this thread:
We originally thought that we had a dead battery so the converter stuff starts about 2/3rds of the way down the first page of the thread. We had also considered replacing the whole unit but instead ended up with an IOTA DLS-45 converter. Our local RV repair man installed it. In order to make it fit in the original converter space, he cut apart the housing - once again, the depth issue - so now it fits.
Others on this site, like EMD_Driver, put their converters elsewhere, which we considered partly b/c in the 2363 the hot & cold water lines for the shower are directly above the converter. But the local guy did a good job making it fit and also installed an "extra" baffle to protect it in case of leaks.
We picked IOTA b/c it had good reviews, as did the PD converters, and is made in the US. WFCO is made in China and there were very few reviews on it. By the way, welcome to the Sunline Owners Club!
Matthew and Lisa
TT: '02 T-2363;
TV: 2012 Ford F-150, 4x4/Off-road, 5.0L V8, "Big Gray"
Reese Straitline w/ dual cam